Home / 189,916.58-261,961.09-121,825.69

Finding the Fourth Proportional to 189,916.58, 261,961.09 and 121,825.69

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Solution

The fourth proportional to 189,916.58, 261,961.09 and 121,825.69 is: 168,040.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    189,916.58 : 261,961.09 = 121,825.69 : x
  2. Step 2: Convert to fraction form
    189,916.58/261,961.09 = 121,825.69/x
  3. Step 3: Cross multiply
    189,916.58x = 261,961.09 × 121,825.69
  4. Step 4: Simplify right side
    189,916.58x = 31,913,589,582.94
  5. Step 5: Solve for x
    x = 31,913,589,582.94/189,916.58
  6. Step 6: Final answer
    x = 168,040.04

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.